跨域××× 组网实例-OptionA
组网需求
R1 和R6 属于同一个×××。R1 通过AS100 的R2 接入，R6 通过AS200 的R5 接入。采用OptionA方式实现跨域的BGP/MPLS ×××.
r1#show run
hostname r1
!
no ip domain lookup
!
ip cef
!
interface Loopback0
ip address 10.1.1.1 255.255.255.0
!
interface FastEthernet0/0
ip address 1.1.1.1 255.255.255.0
duplex half
!
router bgp 1000
no synchronization
bgp log-neighbor-changes
redistribute connected
neighbor 1.1.1.2 remote-as 100
no auto-summary
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
End
r2#show run
hostname r2
!
no ip domain lookup
!
ip vrf vpn
rd 100:1
route-target export 100:1
route-target import 100:1
!
ip cef
!
!
interface Loopback0
ip address 20.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip vrf forwarding vpn
ip address 1.1.1.2 255.255.255.0
duplex half
!
interface FastEthernet1/0
ip address 2.1.1.1 255.255.255.0
duplex half
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 2.1.1.0 0.0.0.255 area 0
network 20.1.1.1 0.0.0.0 area 0
!
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 30.1.1.1 remote-as 100
neighbor 30.1.1.1 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 30.1.1.1 activate
neighbor 30.1.1.1 next-hop-self
neighbor 30.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf vpn
redistribute connected
neighbor 1.1.1.1 remote-as 1000
neighbor 1.1.1.1 activate
no auto-summary
no synchronization
exit-address-family
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
End
r3#show run
hostname r3
!
no ip domain lookup
!
ip vrf vpn
rd 100:2
route-target export 100:1
route-target import 100:1
!
ip cef
!
interface Loopback0
ip address 30.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip vrf forwarding vpn
ip address 3.1.1.1 255.255.255.0
duplex half
!
interface FastEthernet1/0
ip address 2.1.1.2 255.255.255.0
duplex half
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 2.1.1.2 0.0.0.0 area 0
network 30.1.1.1 0.0.0.0 area 0
!
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 20.1.1.1 remote-as 100
neighbor 20.1.1.1 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 20.1.1.1 activate
neighbor 20.1.1.1 next-hop-self
neighbor 20.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf vpn
neighbor 3.1.1.2 remote-as 200
neighbor 3.1.1.2 activate
no auto-summary
no synchronization
exit-address-family
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
End
r4#show run
hostname r4
!
no ip domain lookup
!
ip vrf vpn
rd 200:2
route-target export 100:1
route-target import 100:1
!
ip cef
!
interface Loopback0
ip address 40.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip vrf forwarding vpn
ip address 3.1.1.2 255.255.255.0
duplex half
!
interface FastEthernet1/0
ip address 4.1.1.1 255.255.255.0
duplex half
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 4.1.1.0 0.0.0.255 area 0
network 40.1.1.1 0.0.0.0 area 0
!
router bgp 200
no synchronization
bgp log-neighbor-changes
neighbor 50.1.1.1 remote-as 200
neighbor 50.1.1.1 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 50.1.1.1 activate
neighbor 50.1.1.1 next-hop-self
neighbor 50.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf vpn
neighbor 3.1.1.1 remote-as 100
neighbor 3.1.1.1 activate
no auto-summary
no synchronization
exit-address-family
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
End
r5#show run
!
!
hostname r5
!
no ip domain lookup
!
ip vrf vpn
rd 200:1
route-target export 100:1
route-target import 100:1
!
ip cef
!
interface Loopback0
ip address 50.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip vrf forwarding vpn
ip address 5.1.1.1 255.255.255.0
duplex half
!
interface FastEthernet1/0
ip address 4.1.1.2 255.255.255.0
duplex half
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 4.1.1.0 0.0.0.255 area 0
network 50.1.1.1 0.0.0.0 area 0
!
router bgp 200
no synchronization
bgp log-neighbor-changes
neighbor 40.1.1.1 remote-as 200
neighbor 40.1.1.1 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 40.1.1.1 activate
neighbor 40.1.1.1 next-hop-self
neighbor 40.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf vpn
redistribute connected
neighbor 5.1.1.2 remote-as 2000
neighbor 5.1.1.2 activate
no auto-summary
no synchronization
exit-address-family
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
End
r6#show run
!
hostname r6
!
!
no ip domain lookup
!
ip cef
!
interface Loopback0
ip address 60.1.1.1 255.255.255.0
!
interface FastEthernet0/0
ip address 5.1.1.2 255.255.255.0
duplex half
!
interface FastEthernet1/0
no ip address
shutdown
duplex half
!
router bgp 2000
no synchronization
bgp log-neighbor-changes
redistribute connected
neighbor 5.1.1.1 remote-as 200
no auto-summary
!
ip classless
!
line con 0
exec-timeout 0 0
logging synchronous
!
end
r1# show ip route
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, FastEthernet0/0
5.0.0.0/24 is subnetted, 1 subnets
B 5.1.1.0 [20/0] via 1.1.1.2, 00:12:08
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected, Loopback0
60.0.0.0/24 is subnetted, 1 subnets
B 60.1.1.0 [20/0] via 1.1.1.2, 00:12:08
r2#show ip route vrf vpn
Routing Table: vpn
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, FastEthernet0/0
5.0.0.0/24 is subnetted, 1 subnets
B 5.1.1.0 [200/0] via 30.1.1.1, 00:09:55
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [20/0] via 1.1.1.1, 00:39:04
60.0.0.0/24 is subnetted, 1 subnets
B 60.1.1.0 [200/0] via 30.1.1.1, 00:09:55
r2#show ip ro
2.0.0.0/24 is subnetted, 1 subnets
C 2.1.1.0 is directly connected, FastEthernet1/0
20.0.0.0/32 is subnetted, 1 subnets
C 20.1.1.1 is directly connected, Loopback0
30.0.0.0/32 is subnetted, 1 subnets
O 30.1.1.1 [110/2] via 2.1.1.2, 00:46:41, FastEthernet1/0
r3# show ip ro vrf vpn
Routing Table: vpn
1.0.0.0/24 is subnetted, 1 subnets
B 1.1.1.0 [200/0] via 20.1.1.1, 00:16:55
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.1.0 is directly connected, FastEthernet0/0
5.0.0.0/24 is subnetted, 1 subnets
B 5.1.1.0 [20/0] via 3.1.1.2, 00:10:32
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [200/0] via 20.1.1.1, 00:16:55
60.0.0.0/24 is subnetted, 1 subnets
B 60.1.1.0 [20/0] via 3.1.1.2, 00:10:32
r3#show ip ro
2.0.0.0/24 is subnetted, 1 subnets
C 2.1.1.0 is directly connected, FastEthernet1/0
20.0.0.0/32 is subnetted, 1 subnets
O 20.1.1.1 [110/2] via 2.1.1.1, 00:47:18, FastEthernet1/0
30.0.0.0/32 is subnetted, 1 subnets
C 30.1.1.1 is directly connected, Loopback0
r4# show ip ro vrf vpn
Routing Table: vpn
1.0.0.0/24 is subnetted, 1 subnets
B 1.1.1.0 [20/0] via 3.1.1.1, 00:13:11
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.1.0 is directly connected, FastEthernet0/0
5.0.0.0/24 is subnetted, 1 subnets
B 5.1.1.0 [200/0] via 50.1.1.1, 00:12:22
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [20/0] via 3.1.1.1, 00:13:11
60.0.0.0/24 is subnetted, 1 subnets
B 60.1.1.0 [200/0] via 50.1.1.1, 00:12:22
r4#show ip ro
50.0.0.0/32 is subnetted, 1 subnets
O 50.1.1.1 [110/2] via 4.1.1.2, 00:53:00, FastEthernet1/0
4.0.0.0/24 is subnetted, 1 subnets
C 4.1.1.0 is directly connected, FastEthernet1/0
40.0.0.0/32 is subnetted, 1 subnets
C 40.1.1.1 is directly connected, Loopback0
r5# show ip ro vrf vpn
Routing Table: vpn
1.0.0.0/24 is subnetted, 1 subnets
B 1.1.1.0 [200/0] via 40.1.1.1, 00:12:37
5.0.0.0/24 is subnetted, 1 subnets
C 5.1.1.0 is directly connected, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [200/0] via 40.1.1.1, 00:12:37
60.0.0.0/24 is subnetted, 1 subnets
B 60.1.1.0 [20/0] via 5.1.1.2, 00:26:13
r5#show ip ro
50.0.0.0/32 is subnetted, 1 subnets
C 50.1.1.1 is directly connected, Loopback0
4.0.0.0/24 is subnetted, 1 subnets
C 4.1.1.0 is directly connected, FastEthernet1/0
40.0.0.0/32 is subnetted, 1 subnets
O 40.1.1.1 [110/2] via 4.1.1.1, 00:33:35, FastEthernet1/0
r6# show ip ro
1.0.0.0/24 is subnetted, 1 subnets
B 1.1.1.0 [20/0] via 5.1.1.1, 00:14:49
5.0.0.0/24 is subnetted, 1 subnets
C 5.1.1.0 is directly connected, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [20/0] via 5.1.1.1, 00:14:49
60.0.0.0/24 is subnetted, 1 subnets
C 60.1.1.0 is directly connected, Loopback0
r2#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 30.1.1.1/32 0 Fa1/0 2.1.1.2
17 Aggregate 1.1.1.0/24[V] 520
18 Untagged 10.1.1.0/24[V] 2280 Fa0/0 1.1.1.1
r3#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 20.1.1.1/32 0 Fa1/0 2.1.1.1
17 Untagged 5.1.1.0/24[V] 2280 Fa0/0 3.1.1.2
18 Untagged 60.1.1.0/24[V] 570 Fa0/0 3.1.1.2
r4#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 50.1.1.1/32 0 Fa1/0 4.1.1.2
17 Untagged 1.1.1.0/24[V] 570 Fa0/0 3.1.1.1
18 Untagged 10.1.1.0/24[V] 2280 Fa0/0 3.1.1.1
r5# show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 40.1.1.1/32 0 Fa1/0 4.1.1.1
19 Aggregate 5.1.1.0/24[V] 2080
20 Untagged 60.1.1.0/24[V] 570 Fa0/0 5.1.1.2
